Receptacle and plug connectors

ABSTRACT

A receptacle connector ( 1 ) for a mobile telephone or the like comprises a housing ( 3 ) of insulating material, a shielding ( 4 ), and a plurality of contact terminals ( 5 ). Channels ( 13 ) extend parallel to the lateral sides ( 11 ) between the front and backsides ( 9, 10 ) and the contact terminals are made as strip like elements mounted in these channels. At least some of the contact terminals each are provided with two retention parts ( 14, 15 ) having a width greater than the width of the channels providing a retention force mainly parallel to the upper and lower sides. The contact terminals ( 5 ) each are provided with a butt-mount contact end ( 16 ) and a tail end ( 17 ), wherein the retention part at the tail end has a width greater than the width at the butt-mount contact end. A plug connector ( 34 ) for interconnecting a mobile device to a stationary device, comprises a housing ( 36 ) of insulating material, a shielding ( 44 ), a plurality of contact terminals ( 39 ) mounted in the housing, at least one latch element ( 55 ) to latch the plug connector in a receptacle connector ( 1 ) of the mobile device, and a button ( 60 ) to operate the latch element. The housing of the plug connector is provided with at least one locating peg ( 51 ) to be received in a chamber ( 51 ′) of the receptacle connector.

This application claims the benefit of the earlier filed InternationalApplication No. PCT/EP00/10621, International Filing Date, Oct. 25,2000, which designated the United States of America, and whichinternational application was published on May 17, 2001 as InternationalPublication No. WO 01/35498.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The invention relates to a receptacle connector for a mobile telephoneor the like, comprising a housing of insulating material, a shielding,and a plurality of contact terminals, the housing having a mainlyrectangular block section with flat upper and lower sides and front,back and lateral sides, wherein channels extend parallel to the lateralsides between said front and back sides, the contact terminals beingmade as strip like elements mounted in said channels, and to a plugconnector for interconnecting a mobile device to a stationary device,comprising a housing of insulating material, a shielding, a plurality ofcontact terminals mounted in the housing, at least one latch element tolatch the plug connector in a receptacle connector of the mobile device,and a button to operate the latch element, wherein the housing isprovided with at least one locating peg to be received in a chamber ofthe receptacle connector.

2. Prior Art

Such receptacle and plug connectors are respectively known fromFR-A-2762147 and FR-A-2774516. With ongoing miniaturisation of mobiledevices, in particular mobile telephones, there is a need forminiaturised receptacle and plug connectors. Decreasing the sizes of thereceptacle and plug connectors however is contrary to strengthrequirements for connectors of this type used in mobile devices, whereinthe receptacle and plug connectors are frequently connected anddisconnected.

SUMMARY OF THE INVENTION

The invention aims to provide receptacle and plug connectors of theabove mentioned type having miniature dimensions in combination with ahigh strength.

To this end the receptacle connector of the invention is characterisedin that at least some of the contact terminals each are provided withtwo retention parts having a width greater than the width of thechannels providing a retention force mainly parallel to said upper andlower sides, wherein the width of the channels at their upper wall nearthe upper side of the housing is smaller than the width at their lowerwall near the lower side of the housing to force the contact terminalsagainst the lower wall, and wherein the contact terminals each areprovided with a butt-mount contact end and a tail end, wherein theretention part at the tail end has a width greater than the width at thebutt-mount contact end.

In this manner the contact terminals can be mounted with a highretention force and at an accurately determined position in the housingof the receptacle connector, wherein the load on the walls between thechannels is parallel to the upper and lower sides of the housing toprevent breakage of these intermediate walls.

The plug connector of the invention is characterised in that the housingcomprises inner and outer sections, the inner section being made as acontact block accommodating the contact terminals, the outer sectionbeing made as interconnected bottom and top covers, wherein the outersection includes the locating peg(s) and the button.

In this manner the material of the inner section can be optimised forminiature dimensions, whereas the material of the outer section can beoptimised for strength of the locating peg (a).

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will be further explained by reference to the drawings inwhich embodiments of the receptacle and plug connectors of the inventionare shown.

FIG. 1 shows a perspective view of an embodiment of the receptacleconnector as mounted on a printed circuit board.

FIG. 2 is a perspective view of the receptacle connector of FIG. 1 fromthe lower side.

FIG. 3 shows a perspective view of the connector housing and contactterminals of the connector of FIG. 1, a part of the housing being brokenaway to show the channels in the housing.

FIG. 4 shows a perspective view from the bottom side of the shieldingand the housing of the connector of FIG. 1.

FIG. 5 in a cross section of the connector of FIG. 1.

FIG. 6 partly shows a cross section of the connector of FIG. 1 accordingto the line VI—VI in FIG. 5 with a detail at a larger scale.

FIG. 7 shows a perspective view of an embodiment of the plug connectorof the invention.

FIGS. 8-10 show exploded views of the plug connector of FIG. 7.

FIG. 11 shows a top view of the plug connector of FIG. 7.

FIG. 1 shows a perspective view of a receptacle connector 1 mounted on aprinted circuit board 2 of a mobile device, in particular a mobiletelephone. The receptacle connector 1 comprises a housing 3 ofinsulating material, a metal shielding 4, and a plurality of contactterminals 5, shown in FIG. 3 together with the housing 3.

The housing 3, a part of which is broken away in FIG. 3, has a mainlyrectangular block section 6 with flat lower and upper sides 7,8, andfront, back and lateral sides 9,10,11 respectively. At both lateralsides 11 the housing block 6 is provided with a lug 12 near the backside10. The housing 3 is provided with channels 13 extending parallel to thelateral sides 11 between the front and backsides 9,10. Each channel 13accommodates a contact terminal 5.

The contact terminals 5 each are made as a strip-like element having tworetention parts 14,15 having a width greater than the width of thechannels 13. As shown in FIGS. 2,3 and 5, each contact terminal 5 isprovided with a butt-mount contact end 16 and a solder tail end 17,wherein the tail ends 17 are connected to the circuit tracks 18 of theprinted circuit board 2 using a surface mount technology. Although thecontact terminals 5 are shown in FIG. 3 separate from the housing 3 withtheir contact ends 16 being bent perpendicular to the remaining part ofthe contact terminal, the contact terminals 5 are inserted beforebending into the channels 13 from the back side 10 of the block section6. In this manner, the surface mount tail ends 17 can not be affectedduring inserting the contact terminal into the housing and bending themafter insertion allows to get a significantly better coplanarity of thetail ends.

As shown in FIG. 5, the height of the channels 13 is greater than thethickness of the strip-like contact terminals 5, whereas as shown in thecross section of FIG. 6, the width of the channels 13 at their upperwall 19 near the upper side 7 of the housing 3 is smaller than the widthat their lower wall 20 near the lower side 8 of the housing 3. Theretention part 14 at the tail end 17 of each contact terminal has awidth greater than the width of the retention part 15 at the butt-mountcontact end 16 in order that this retention part 15 also serves as aguiding part. In this manner upon insertion of a contact terminal 5 intoa channel 13 the retention forces will mainly be extending parallel tothe upper and lower sides 7,8 of the housing 3, while relatively smallretention forces are directed perpendicular to the upper and lower sides7,8. In this manner relatively high retention forces to mount thecontacts stationary in the housing 3 can be obtained without causingbreakage of the thin intermediate walls between the channels 13 of thehousing due to high outwardly directed loads on the upper and lowersides 7,8.

The small interference between the upper side of the contact terminals 5and the oblique side walls 21 of the channels 13 guarantee that thecontact terminals 5 are forced downwardly on the lower walls 20 of thechannels 13. The lower walls 20 are lying in one common reference plane,so that the interference between the contact terminals 5 and the obliqueside walls 21 of the channels attributes in a favourable manner to thecoplanarity of the tail ends 17 of the contact terminals.

The shielding 4 of the receptacle connector 1 is made as a casing havingupper and lower plates 22,23 interconnected by side plates 24, whereinthe upper and lower plates 22,23 contact the upper and lower sides 7,8of the housing 3. The lower plate 23 is provided with two positioninglips 25 engaging a positioning slot 26 provided in the lower side 8 ofthe block section 6. As shown in the drawings, the positioning lips 25and the co-operating side walls of the positioning slot 26 are formed insuch a manner that the lower plate 23 can not be forced away from thelower side 8. Other shapes providing such a fixation of the lips 25 arepossible. The positioning slot 26 of the housing 3 is open at the backside 10 and is provided with a stop 27 at the front side 9 which abutsagainst stop edges 28 of the positioning lips 25 when the housing 3 isreceived within the shielding 4 during manufacturing. This allows toaccurately and efficiently tighten and fix the shielding 4, which is cutin this area.

As shown in FIG. 4, the lower side 8 of the block section 6 is providedwith two recesses 29, each recess having an oblique wall 30. The lowerplate 23 of the shielding 4 is provided with two bending lips 31 whichafter inserting the housing 3 into the shielding 4 are presseddownwardly into the recesses 29 and by co-operation of these bendinglips 31 with the oblique walls 30, the stop edges 28 are forced againstthe stop 27 of the positioning slot 26. Further, stop plates connectedto the side plates 24 co-operate with stop faces 33 of the lugs 12. Inthis manner an accurate positioning and fixation of the housing 3 withinthe shielding 4 is guaranteed.

In view of the design of the receptacle connector 1, the dimensions ofthe connector can be minimised. In practice, the contact terminals 5 canbe mounted at a pitch of 0.8 mm. Retention forces can be high as theretention forces are mainly parallel to the upper and lower sides 7,8 ofthe housing. Further, as the shielding 4 fully encloses the housing 3,preferably with a snug fit between upper and lower sides 7,8 and upperand lower plates 22,23, the shielding provides further strength to theconnector.

It is noted that the contact terminals 5 are preferably mounted into thechannels 13 in such a manner that the rounded side edges caused bystamping are located at the side of the lower walls 20 of the channels13. In this manner an accurate positioning of the contact terminals isachieved, while damage to the lower walls 20 during insertion of thecontact terminals is prevented.

FIG. 7 is a perspective view of a plug connector 34 adapted to beinserted into the receptacle connector 1 of FIG. 1. In the embodimentshown the plug connector 34 is connected to a cable 35. FIGS. 8-10 showexploded views of the plug connector 34 in various stages duringassembly.

The plug connector 34 comprises a housing 36 of insulating materialincluding an inner section 37 and an outer section 38. The inner section37 is made as a contact block accommodating contact terminals 39 havinga contact end 40, an intermediate spring section 41 and a connection end42. The contact ends project out of the plug connector 34 as can be seenin FIG. 7. The connection ends 42 are connected to a printed circuitboard 43 located at the backside of the outer section 38. The wires ofthe cable 35 are also connected to the printed circuit board 43 (for thesake of clarity the wires are not shown in the drawings). The innersection 37 together with the printed circuit board 43 are mounted withina shielding 44 having an upper shielding plate 45 and a lower shieldingplate 46. At the front end the shielding plates 45,46 are provided withcontact dimples 47 adapted to contact the shielding 4 of the receptacleconnector 1. The lower shielding plate 46 is provided with solder lips48 connected to the printed circuit board 43 as shown in FIG. 10. Thecomplete interconnection of the cable wires to the contact terminals 39is fully shielded in this manner.

The outer section 38 comprises a top cover 49 and a bottom cover 59. Thebottom cover 50 is provided with two locating pegs 51, one at each side.The locating pegs 51 are received in locating openings 51′ of thereceptacle connector 1 located between the lateral sides 11 of the blocksection 6 and the side plates 24 of the shielding 4.

The dimensions of the plug connector 34 described can be miniaturised asthe material of the inner section 37 of the housing 36 can be optimisedfor manufacturing in small dimensions, whereas the material of the outersection 38 can be optimised for strength of the locating pegs 51. Thelocating pegs 51 are further reinforced by mounting a peg blade 52inside a slot 53 in the peg 51.

At the inner side of the peg blade 52 a further slot 4 is provided inthe locating pegs 51 for mounting a latch blade 55. As shown in FIG. 8,each latch blade 55 comprises a lower part 56 carrying at one side anupper spring part 57 and at its free end the spring part 57 carries alatch 58. The spring part 57 can be operated by means of an extension 59projecting upwardly from the spring part 57 for coupling to a button 60which is part of the top cover 49 of the outer section 38,

It is noted that in view of the design of the bottom cover 50 with slots53,54 open at their upper sides, the peg blades 52 and the latch blades55 can be assembled with the bottom cover 50 by top loading, whichresults in an advantageous manufacturing step.

The button 60 is an integral part of the top cover 49 and is separatedfrom the top cover along a major part of its circumference by a slot 61as can be seen in FIG. 11. The button 60 is interconnected to the topcover 49 by two hinges 62, wherein the button 60 is relatively rigidbetween these two hinges 62. In this manner it is guaranteed thatindependent of the location of the pressing force on the button 60, bothlatches 58 are operated.

Upon insertion of the plug connector 34 into the receptacle connector 1,the latches 58 are received in latch pockets 63 provided in the upperplate 22 of the shielding 4. For removal of the plug connector 34, thebutton 60 is pressed downwardly releasing the latches 58 from the latchpockets 63.

It is noted that the inner section 37 is provided with a peg 64projecting with respect to the projecting contact ends 40 of the contactterminals 39 to protect these projecting contact ends 40 againstdeformation.

The invention is not restricted to the above-described embodiments ofthe connectors 1 and 34, which can be varied in a number of ways withinthe scope of the attached claims.

What is claimed is:
 1. Receptacle connector (1) for a mobile telephoneor the like, comprising a housing (3) of insulating material, ashielding (4), and a plurality of contact terminals (5), the housinghaving a mainly rectangular block section with flat upper and lowersides (7,8) and front, back and lateral sides (9, 10, 11), whereinchannels (13) extend parallel to the lateral sides (11) between saidfront and back sides (9,10), the contact terminals being made as striplike elements mounted in said channels, characterized in that at leastsome of the contact terminals each are provided with two retention parts(14, 15) having a width greater than the width of the channels (13)providing a retention force mainly parallel to said upper and lowersides (7, 8), wherein the width of the channels (13) providing aretention force mainly parallel to said upper and lower sides (7, 8),wherein the width of the channels at their upper wall (19) near theupper side (7) of the housing (3) is smaller than the width at theirlower wall (20) near the lower side (8) of the housing (3) to force thecontact terminals (5) against the lower wall (20), and wherein thecontact terminals (5) each are provided with a butt-mount contact end(16) and a tail end (17), wherein the retention part (14) at the tailend (17) has a width greater than the width at the butt-mount contactend (16).
 2. Receptacle connector according to claim 1, wherein theshielding (4) is made as a casing having upper and lower plates (22, 23)interconnected by the side plates (24), said upper and lower platescontacting the upper and lower sides (7,8) of the housing (3), whereinthe housing is provided with a positioning slot (26) in the lower side(8) and the lower plate (23) of the shielding is provided withpositioning lips (25) engaging into the positioning slot (26). 3.Receptacle connector according to claim 2, wherein the positioning lips(25) and the co-operating side walls of the positioning slot (26) areformed in such a manner that the lower plate (23) can not be forced awayfrom the lower side (8), wherein the positioning (26) is open at theback side (10) and is provided with a stop (27) at the front side end,wherein the housing is further provided with at least one receivingchamber (29) in its lower side having a wall (30) extending oblique withrespect to the back side, wherein the shielding (4) is provided with abending lip (31) engaging said oblique wall to press positioning lipsagainst the stop (27).
 4. Receptacle connector according to claim 2,wherein the side plates (24) of the shielding (4) each are provided witha stop plate (32) co-operating with a stop face (33) of a lug (12)provided on each of the lateral sides of the housing (3).
 5. Plugconnector (34) for interconnecting a mobile device to astationary-device, comprising a housing (36) of insulating material, ashielding (44), a plurality of contact terminals (39) mounted in thehousing, at least one latch element (55) to latch the plug connector ina receptacle connector (1) of the mobile device, and a button (60) tooperate the latch element, wherein the housing is provided with at leastone locating peg (51) to be received in a chamber (51′) of thereceptacle connector, characterized in that the housing (36) comprisesinner and outer sections (37, 38), the inner section being made as acontact block accommodating the contact terminals (39), the outersection being made as interconnected top and bottom covers (49, 50),wherein the outer section includes the locating peg(s) and the button.6. Plug connector according to claim 5, wherein the shielding (44) ismounted between the inner (37) and outer (38) sections of the housingand encloses the inner section (37) as a casing.
 7. Plug connectoraccording to claim 5, wherein the or each locating peg (51) is providedwith a first slot (53) accommodating a reinforcing blade (52).
 8. Plugconnector according to claim 7, wherein the or each locating peg (51) isprovided with a second slot (54) accommodating a latch blade (55)carrying a latch element (55) and an upwardly projecting extension (59)coupling the latch blade to the button (60).
 9. Plug connector accordingto claim 8, wherein the bottom cover (50) is provided with a locatingpeg (51) at opposite sides and the top cover (49) is provided with anupper wall, the button (60) being an integral part of said upper wall,wherein the button is separated from the upper wall along itscircumference by a slot (61) and is interconnected to the upper wall atopposite sides by a hinge section (62), wherein the button part betweenthe hinge sections is relatively rigid.
 10. Plug connector according toclaim 9, wherein the contact terminals (39) each are provided with acontact end (40) projecting out of a front side of the inner section,wherein the front side of the inner section is provided with aprojecting peg (64) for protection of the projecting contact ends.